Various LEDs were pulsed using a Tektronix pulser. A short
clip lead was sometimes placed on a teed output at the Tektronix pulser output.
A short BNC cable delivered the pulse to the diode. The diode was mounted
inside a dark box and a pmt was used to view the light from the LED.

In addition to exploration of the diode pulsed by the
Tektronix pulser,the KAMLAND style
pulser board has been investigated. This basically drives the LED by
discharging a capacitor through the diode. The circuit opens two switched to
fire the diode. A simplified version of the circuit is shown below.